Aliens Must Die is a fighting game on hitfreegames.com in which you steer a sophisticated fighter plane to protect the Earth. You will steer the aircraft in outer space. Many alien invaders want to conquer the Earth. So here you are the warrior to save human beings. You can move your fighter plane by arrow keys. Dont hit alien ships or UFO for it will reduce your health. A female instructor will tell you what you shall do and the current conditions. Try to collect a blue square for a score bonus. When you kill an enemy spaceship, it will leave debris and you should collect the debris as more as possible. You can also pick up some items to recover your health and obtain more powerful weapons. Avoid being shot by red bullets from aliens. You must eliminate all alien ships to move to the next level. Fight now!